Full Stack Engineer · AI-First Delivery · Systems That Ship

Full Stack Engineer delivering production systems end-to-end — architecture, integrations, CI/CD, and deployment — solo, at the velocity of a team. AI-first workflow: TypeScript, React 18, Next.js 14, Python, FastAPI, Django REST, PostgreSQL. Running Gurudo, a B2B software consultancy (Sweden). EU/US remote. Shipped SaaS to paying customers, enterprise platform serving thousands of users, and a full RAG-based AI system — all as a single developer.

📅 Book a call · 🌐 lukaszglowacz.com · 💼 LinkedIn

Frontend TypeScript React 18 Next.js 14 Tailwind CSS React Query Zustand NextAuth.js next-intl Framer Motion PWA

Backend Python Django REST Framework FastAPI PostgreSQL MongoDB Redis Docker Compose REST API design

AI / LLM Claude API RAG Architecture OpenAI Embeddings Vector Search SSE Streaming Prompt Engineering

DevOps & Testing GitHub Actions Vercel Docker CI/CD Vitest Jest pytest mypy ESLint

Integrations JWT SSO Stripe Tpay Webhooks Google Maps API FCM / Firebase Push API / VAPID

Languages Polish (Native) · English (Professional) · Swedish (Professional)

Apr 2024 – Present · Stockholm, Sweden · B2B contracts only

Next.js 14 · React 18 · TypeScript · Django REST · Thousands of users

• Built public-facing site in 4 languages (pl/en/de/uk-UA) with next-intl, session-aware Middleware routing, and full SEO infrastructure across ~28 pages (metadata, Open Graph, hreflang, dynamic sitemap.xml).
• Eliminated N+1 API pattern via batch Data API fetching with React Context, reducing API calls by ~90% and cutting page load from ~3s to under 800ms on data-heavy views.
• Diagnosed and resolved production payment failure same-day: incorrect Tpay API mapping blocking all premium upgrades — restored revenue flow within hours.
• Implemented end-to-end Web Push Notifications (FCM + Django REST + Service Worker + React hooks + Zustand). Drove premium conversion from 1.1% to 4.8% within 2 months of launch.
• Designed JWT SSO integration with external microservice: subscription-aware UI, token TTL, portal redirect, backend webhook. Maintained CI/CD (GitHub Actions + Vercel) for staging and production.
• Fixed React Query stale data bug and null-token pagination causing duplicate entries — resolved 2 bugs persisting for weeks.

Django REST · React · TypeScript · PostgreSQL · Stripe · Docker

• Shipped end-to-end as sole developer — architecture, database, frontend, billing, DevOps — to production with paying B2B customers in 5 months.
• Backend: 100m geolocation clock-in validation, JWT auth, role-based permissions, automated PDF reports (~200/week). Frontend: real-time dashboard, Stripe per-seat billing, Klaviyo automation, Google Maps.
• Deployed on DigitalOcean with Docker Compose; ~99.5% uptime over 7-month operational period.

→ Frontend · Backend

7 years of B2B sales, stakeholder management, and cross-functional collaboration — transitioned to software engineering in 2022.

AI knowledge base chatbot: full RAG pipeline (chunking, OpenAI embeddings, cosine similarity, Claude streaming via SSE), Next.js 14 chat UI, 7-job CI pipeline, Docker Compose. Sub-second retrieval across ~500 chunks.

FastAPI Claude API RAG Next.js 14 TypeScript Docker → Repository

TypeScript library built TDD-first. 100% test coverage, CI/CD with GitHub Actions, semantic versioning, npm-ready.

TypeScript TDD Vitest GitHub Actions 100% coverage

Full-Stack Software Development Diploma · CODE Institute · 2022

Bachelor of Science (Chemistry) · University of Gdansk · 2004–2007

Open for remote B2B contracts only — EU/US remote.

📅 Book a call 📧 [email protected] 🔗 lukaszglowacz.com 💼 linkedin.com/in/lukasz-glowacz-dev